Brush-making machine



NOV. 4, 1930. l c SHULTZ 1,780,278

BRUSH MAKING MACHINE Filed Jan. 51, 1950 WMHIEH WWI-M Invent or C'. F. Shultz Patented Nov. 4, 1930 r UNITED STATES PATENT OFFICE I GHAUNGEY r. SI-IULTZ, or s r. nouis, iviissouiii BRUSH-MAKING MACHINE Application filed January 31, 1930. Serial No. 424,753.

My invention relates to a machine for in common use and form no part of my inmaking brushes and particularly to the type ention except in combination with the guidof machine in which radial wires, bristles or ing means hereinafter described. fibers are twisted between two or more cen- Vertically adjustable in the bed plate by '5 tral or core strands of relatively heavy wire means of a set screw is a post 16 on which to produce a brush of cylindrical form. is'mounted a block 17 provided with ways Heretofore it has been necessary to trim the 18 in which slides a plate 19 forming the ends of the radial strands, after the forma base of theguide. The guide which is cylintion of the brush, to bring the brush into drical in form is composed of a lower part In proper cylindrical form. This is due to the 20 and an upper part 21 pivotally secured fact that during the twisting operation some together by a hinge joint 22. j The dividing or all of the strands become more or less line between the "two parts is somewhat displaced in the direction of their'length so above the axial line of the cylinder for the that their ends do not project equal dis purpose hereinafter 'set forth. The end of 1 tances at each side of the core. Further, the guide adjacent to the non-rotating chuck it has been difficult to maintain a uniform 12 is closed by a divided endplate 23 having distribution of the strands in the direction a central opening 24 for the passage of the of the length of the brush. core wires. A handle 25 is provided for The object of my invention is to provide swinging the upper part of the guide on its 20 guiding means engaging the ends of the hinge joint 22.

cross strands of the brush during the twist- The operation. of the machine is as foling operation thus insuring the formation lows: The guide is positionedas shown in of a truly cylindrical brush and at the same Figure 1, concentric with the core wires and time securing uniform distribution of the close to the chuck 12. The upper part of the strands in a longitudinal direction. v guide is swung back on its hinge leaving the In the accompanying drawings which illower part open at the top. The cross or lustrate one form of machine made in acfiller wires 27 are now inserted in vertical cordance with my invention Figure 1 is a position between the core wires, their lower side elevation on a reduced scale; Figure 2 ends resting on the bottom of the lower part 39 is an end view of the guide; Figure 3 is a of the guide. In case only two core wires so cross section of the guide showing the core are used, the guide is now closed and the and cross strands in position; and Figure 4 twisting operation performed. When, howis a view showing means for reducing the ever, four core wires are used, as shown in internal diameter of the guide. the drawings, the core is rotated one quarter 35 The machine comprises a head stock 5 and of a revolution to bring the first set of filler a tail stock 6 carried on a bed plate 7. wires into horizontal position, and a second Mounted in the head stock is a rotary spinset inserted in the same manner as-the first dle 8 driven from a pulley 9 and carrying and at right angles thereto. It will be unthe rotating chuck 10 for engaging one end derstood that the chuck 12 is capable of 40 of the core wires 11. The other ends of the degree play with respect to the rack bar to 90 core wires are engaged by a non-rotating permit of such movement of thecore. This, chuck 12 carried by a rack bar 13 sliding in however, in no way interferes with its functhe tail stock. During the formation of a tion of holding the core against rotation durbrush the chuck 12 travels toward the chuck ing the twisting operation. It is to provide 45 10 due to the shortening of the core resultretaining walls for both ends of the first set ing from the twisting of the wires composof filler wires while the second set is being ing it. In order to maintain the necessary positioned that the guide is divided above the tension on the core the longitudinal movemiddle. In case the machine is to be used ment of the chuck 12 is retarded by a band only for brushes with a single set of filler brake 14. The above mentioned parts are wires, the guide may be centrally divide After both sets of filler wires are in place the in symmetrical relation to the core during guide is closed and the twisting operation the twist ng operatlon.

I performed in the usual manner. As the In testimony whereof, I hereunto affix my chuck 12 moves toward the chuck 10, due to signature, this 28th day of January, 1930.

5 the shortening of the wires, it strikes the end CHAUNCEY F. SHULTZ. m

plate 23 and slides the guide before it on its ways. This is essential, however, only when the interior diameter of the guide is less than the exterior diameter of the chuck. Otherwise the guide may be stationary instead of 7 sliding, the end wall being omitted so that the chuck may enter the guide.

When a different size of brush is to be made, a guide of a different size may be sub- 5 stituted, being centered by the vertical adso justment of the post 16. Or, one guide may be used of several sizes of brush by the use of removable fillers 26, as shown in Figure 4.

The use of the guide holds the filler wires perfectly symmetrical with respect to the 65 cor-e so that no trimming of the brush is necessary. I find also that the friction of the ends of the filler against the walls of the guide keeps these wires evenly distributed,

preventing bunching with resultant lack of JG evenness in the completed brush.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

'30 1. In a device-of the class described, the V 95 combination with core twisting means, of a hollow cylindrical guide surrounding the core and holding the fillers in symmetrical relation to the core during the twisting op- 85 eration.

2. In a device of the class described, the combination with core twisting means, of a longitudinally travelling hollow cylindrical guide surrounding the core and holding the v 40 fillers in symmetrical relation to the core 105 during the twisting operation.

3. In a device of the class described, the combination with core twisting means, of a hollow cylindrical guide surrounding the I core and holding the fillers in symmetrical V relation to the core during the twisting operation, said guide being divided to permit of the insertion of the fillers.

4. In a device of the class described, the

combination with core twisting means, of a 115 hollow cylindrical guide surrounding the core and holding the fillers in symmetrical relation to the core during the twisting operation, said guide being divided along a line above the axis to permit of the insertion of fillers in a vertical direction and to form retaining walls for both ends of horizontal fillers.

5. In a device of the class described, the

combination with core twisting means comprising a head stock and a tail stock having relative movement toward and away from each other, of a hollow cylindrical guide 55 surrounding the core and holding the fillers V 339 

